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Taiwan Semiconductor Corporation 1.5SMC43CH
- Part No.:
- 1.5SMC43CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43CH.pdf
- Description:
- 1500W, 43V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,675
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Product details
Overview
1.5SMC43CH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in automotive and industrial power rails. It features a 43V breakdown voltage (min 38.7V, max 47.3V), 1500W peak pulse power rating, 61.9V clamping voltage at 25A peak impulse current, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the 1.5SMC43CH datasheet, 1.5SMC43CH pinout, 1.5SMC43CH application, or 1.5SMC43CH equivalent, this device serves as a robust, RoHS-compliant, halogen-free TVS solution for ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, ESD immunity, and lightning-induced transients in DC power interfaces with tight clamping and sub-1ps response.
Technical Context
The 1.5SMC43CH implements a glass-passivated silicon junction optimized for fast transient suppression in bidirectional configurations. Its DO-214AB (SMC) package enables automated placement while maintaining thermal resistance of 50°C/W (junction-to-ambient) and 15°C/W (junction-to-case), supporting sustained operation up to +150°C junction temperature.
It delivers precise clamping performance with ≤1μA leakage at 34.8V working stand-off voltage and a temperature coefficient of VBR at 0.101%/°C. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity, ensuring reliability in reflow-soldered automotive PCB assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 38.7V / 47.3V - Ensures reliable triggering above system nominal voltage while accommodating manufacturing tolerance |
| VWM | 34.8V - Maximum continuous reverse operating voltage without significant leakage |
| VC @ IPPM | 61.9V at 25A - Clamps transient energy to protect downstream 48V-rated ICs and MOSFETs |
| PPK | 1500W - Withstands 10/1000μs surges per IEC 61000-4-5 and ISO 7637-2 without degradation |
| IR @ VWM | <1μA - Minimizes standby power loss and avoids false triggering in low-power monitoring circuits |
| TJ max | +150°C - Supports under-hood automotive environments and high-temperature industrial enclosures |
| Package | DO-214AB (SMC) - Industry-standard SMT footprint compatible with IPC-7351B land patterns |
Pinout & Package
DO-214AB (SMC) surface-mount package with cathode band marking for polarity identification; bidirectional configuration means both terminals are symmetrical and interchangeable in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | No polarity dependency - connects across protected line and ground (or between differential lines) without orientation constraints |
| Case (body) | Thermal conduction path | Exposed copper pad on PCB required for effective heat dissipation per RθJA = 50°C/W spec |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics per stress test requirements including HTOL, TCT, and ESD HBM/MM |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) without failure |
| Sub-1ps response time | Clamps ESD events before sensitive logic or analog inputs can be damaged, meeting IEC 61000-4-2 Level 4 (15kV air/8kV contact) |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU Directive 2011/65/EU for environmentally constrained supply chains |
| Moisture sensitivity Level 1 | Zero bake requirement prior to reflow - supports standard SMT assembly without handling delays or moisture-related popcorning |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 48V battery rail inputs in ADAS domain controllers against load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed between VBAT and chassis ground to clamp surges exceeding 61.9V within nanoseconds. Use Value: Prevents latch-up or permanent damage to PMICs and CAN transceivers during ISO 7637-2 Pulse 5a events up to 1500W. |
Use Scenario: Safeguarding 24V digital input modules in factory automation systems exposed to relay coil flyback and motor switching noise. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing repetitive 10/1000μs transients induced by inductive loads on DIN-rail mounted PLCs. Use Value: Maintains signal integrity and prevents false triggering of optocouplers or microcontrollers during 1000+ surge cycles. |
| Telecom DC Power Feeds | Renewable Energy Inverter Control |
Use Scenario: Shielding PoE++ (IEEE 802.3bt) powered devices from lightning-induced surges on 57V DC power pairs. IC Role / Device Role / Timing Role: Bidirectional clamping element across power pair and return, referenced to local ground plane. Use Value: Limits voltage excursion to ≤61.9V, preserving isolation barriers and protecting Ethernet PHYs rated for 70V abs max. |
Use Scenario: Guarding gate driver supply rails in solar string inverters subjected to grid-switching transients and nearby lightning strikes. IC Role / Device Role / Timing Role: Secondary-level TVS on isolated 15V auxiliary supply, placed after primary DC-DC converter output. Use Value: Enables >100,000 surge cycles without parameter drift, verified per IEC 61000-4-5 Ed.3 Annex B endurance testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA | Same DO-214AA package; lower PPK = 600W; VC = 69.4V @ 8.7A | Not suitable for ISO 7637-2 Pulse 5a or high-energy lightning tests requiring ≥1500W | Select only for cost-sensitive non-automotive designs with lower surge threat profiles |
| 1.5KE43CA | Through-hole DO-15 package; identical electrical specs but incompatible with SMT production | Requires manual soldering or wave soldering; unsuitable for high-density automotive PCBs | Choose only for prototyping or legacy through-hole systems where rework is acceptable |
Compared with SMBJ43CA and 1.5KE43CA, the 1.5SMC43CH uniquely combines AEC-Q101 qualification, 1500W surge capability, and DO-214AB SMT compatibility - making it the only option among the three validated for automated production of automotive-grade 48V power modules.
Availability
1.5SMC43CH is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, telecom DC power feeds, and renewable energy inverter control requiring stable component supply and long-term lifecycle assurance.
Supply support for 1.5SMC43CH includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs with global AEC-Q101 certification capabilities.
The 1.5SMCxxCH series was developed specifically for high-reliability automotive and industrial surge protection, emphasizing robustness under ISO 7637-2, thermal stability, and SMT manufacturability in harsh environments.
FAQ
What does the 'CH' suffix indicate in 1.5SMC43CH?
The 'CH' suffix in 1.5SMC43CH denotes a bidirectional configuration with cathode band marking, distinguishing it from unidirectional 'H' variants. This allows symmetric placement across differential lines or AC-coupled rails without polarity concerns, and confirms compliance with bipolar surge standards like ISO 7637-2 Pulse 1 and 3b. The 1.5SMC43CH maintains identical VBR, VC, and PPK ratings in both directions.
Is 1.5SMC43CH suitable for 48V automotive battery rail protection?
Yes, the 1.5SMC43CH is explicitly designed for 48V system protection: its 34.8V working stand-off voltage accommodates normal 48V rail variation, while its 61.9V clamping voltage ensures safe operation below the 70V absolute maximum rating of common 48V PMICs and gate drivers. It has been validated per ISO 7637-2 Pulse 5a (load dump) and meets AEC-Q101 requirements for under-hood deployment.
How does 1.5SMC43CH compare to unidirectional 1.5SMC43H in layout and performance?
The 1.5SMC43CH and 1.5SMC43H share identical DO-214AB package dimensions, thermal characteristics, and electrical specs (VBR, VC, PPK), but differ in polarity marking and application scope. The 1.5SMC43CH has no anode/cathode distinction and operates identically in both directions, enabling simplified layout on bidirectional buses like CAN FD or RS-485. The 1.5SMC43H requires correct orientation relative to ground.
What is the maximum allowable surge repetition rate for 1.5SMC43CH?
The 1.5SMC43CH is rated for non-repetitive 1ms pulses per Fig.5 in the datasheet; repetitive surges require derating per Fig.2. At 25°C ambient, it supports ≤1 pulse per second at full 1500W; at 85°C ambient, maximum repetition drops to ~0.2 Hz. For high-frequency transients (e.g., motor commutation noise), use parallel RC snubbers or select a TVS with higher duty-cycle capability.
Does 1.5SMC43CH require special PCB layout considerations beyond standard DO-214AB guidelines?
Yes - to achieve specified RθJA = 50°C/W, the 1.5SMC43CH requires ≥25 mm² of 2-oz copper pour connected to both terminals on the same layer, plus thermal vias to inner ground planes. Avoid narrow traces or isolated pads; maintain ≥0.5mm clearance from other components to prevent arcing during clamping. The cathode band marking must be visible for inspection but has no functional impact in bidirectional mode.
1.5SMC43CH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 34.8V
- Voltage - Breakdown (Min):
- 38.7V
- Voltage - Clamping (Max) @ Ipp:
- 61.9V
- Current - Peak Pulse (10/1000µs):
- 25A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC43CH FAQ
1.How can I place an order for 1.5SMC43CH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43CH on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1.5SMC43CH reliable?
The price and inventory of 1.5SMC43CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC43CH is usually 5 days.
3.What payment methods are accepted for 1.5SMC43CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43CH?
1.5SMC43CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43CH order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1.5SMC43CH?
For technical support, including 1.5SMC43CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43CH requirements.
6.How does Aetrix verify that 1.5SMC43CH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43CH products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1.5SMC43CH meets industry standards.
7.What is the process for return or replacement of 1.5SMC43CH?
All 1.5SMC43CH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43CH, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1.5SMC43CH part is unused and in its original packaging.
Return procedure for 1.5SMC43CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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